Magento: How to change Admin route frontname & admin route name

There is no simple solution to this. You cannot just change the frontname of the admin route. You must also change the route name. This is because Magento expects both route frontnames and route names to be unique across all routers. Specifically, Mage_Core_Model_Url::getUrl() eventually calls a method on the front controller which retreives the router from the route name, which must be unique or there will be conflicts.For more details click here...